As he entered the building, someone was in charge of directing him to the place where he should enter. This was a private building; it did not belong to the government, much less to an organization.
According to what Klaus could find out during the day, this building belongs to an exclusive and very rich person in the city. Although essentially no one knows who it is, there are those who say it belongs to one of the leaders of the most powerful sorcerer's organizations, either Red Tower or the rival of this one.
But there are those who say it belongs to an anonymous rich man from another country.
In the end, no one knows the truth. Even those who work in the building are not entirely clear who the leader is.
But somehow, Klaus already figured out who it was.
As he walked through the huge building, he was offered various snacks but wasn't interested in them.